A. P. Menushenkov, Ya. V. Rakshun, M. N. Mikheeva, K. V. Klement'ev, A. A. Teplov, A. M. Bryazkalo, “Crystal-quasicrystal local structural transition in Al-Cu-Fe”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2005, Volume 81, Issue 9,Pages <nobr>595

This article is cited in 6 papers

CONDENSED MATTER

Crystal-quasicrystal local structural transition in Al-Cu-Fe

A. P. Menushenkov^a, Ya. V. Rakshun^b, M. N. Mikheeva^c, K. V. Klement'ev^d, A. A. Teplov^c, A. M. Bryazkalo^c

^a Moscow Engineering Physics Institute (State University)
^b G I. Budker Institute of Nuclear Physics, Siberian Branch of Russian Academy of Sciences, Novosibirsk
^c Russian Research Centre "Kurchatov Institute", Moscow
^d HASYLAB, DESY, D-22607 Hamburg, Germany

Abstract: The rearrangement of the local environments of copper and iron in the ternary alloy Al₆₅Cu₂₂Fe₁₃ in transition from a crystalline phase to a quasicrystalline phase has been studied by combined extended x-ray absorption fine structure (EXAFS) and x-ray absorption near-edge structure (XANES) analysis. It has been found that the nearest environment of copper retains symmetry characteristic of a crystal; however, a turn and small shifts of copper matrix atoms causes a considerable rearrangement of aluminum atoms around iron. As a result, icosahedral clusters with pentagonal symmetry are formed around iron atoms, and translational symmetry breaking is accompanied by the transition of Al₆₅Cu₂₂Fe₁₃ to a quasicrystalline state.

PACS: 61.10.Ht, 61.44.Br